That will not be easy. There is no way to convert the JSF and/or ADF rich client tags to a feasible desktop ui technology.
What have you planed to use a ui technology (swing, fx, ...)?
What have you planned for hte model part of the application. Web apps run this part on a server.
You may want to investigate java web start...
In any case you have to rebuild/redesign of the UI. There is no way to migrate the UI from faces to swing. You should try out if you like the experience developing the UI in swing.
And think about help if you need help or a patch. There would not much help available.
We can't decide this for you. We don't know enough about your use case.
Why don't you give it a try and get some experience yourself.
Then you have to decide if you want to use ADF Swing, which force you to remain on jdev 11.1.1.x